Engine rebuild help

[DistortedJones]

So im rebuilding the CLASSIC m10 because i spun a bearing and i forgot how the timing and the sump chain guilds are supposed to be fitted and i have this workshop manual but its not really helping me 

['76mintgrün'02]

The factory manual is available on this site in the articles section

 

https://www.bmw2002faq.com/articles.html/technical-articles/history-and-reference/bmw-2002-service-repair-manual-r247/

[Son of Marty]

It might help if you turn the crank shaft around.

[jireland2002]

You have the crank in backwards.

[Hans]

OK, maybe I need another coffee, but I'd say the crank is in  backwards. You better look at that manual again.

[AustrianVespaGuy]

Lol, yes indeed, that's the 8-bolt flywheel hub of the crank we're looking at there.  I never realized that crank was so darn symmetrical!  Might want to double check the piston orientations too at this point, just in case!

[DistortedJones]

lol thank you, this is my first time rebuilding an engine as you can tell 

[Einspritz]

Is the metal pipe from the oil pump severely bent?

That may be a problem in pinching off the flow of oil, which would explain one reason why you spun a bearing.

 

[DistortedJones]

 

1 hour ago, AustrianVespaGuy said:

Lol, yes indeed, that's the 8-bolt flywheel hub of the crank we're looking at there.  I never realized that crank was so darn symmetrical!  Might want to double check the piston orientations too at this point, just in case!

whats the correct orientation for the pistons?

 

[DistortedJones]

1 hour ago, Einspritz said:

Is the metal pipe from the oil pump severely bent?

That may be a problem in pinching off the flow of oil, which would explain one reason why you spun a bearing.

 

maybe? but i dont think so, thats how it was when i took off the timing cover.

[Guest_anonymous]

There is probably more information you need than this thread is capable of addressing. Turn the crank around as mentioned. The main caps are usually numbered. The bearing locks sit lock to lock. The rod caps are numbered according to the jug. That number sits on the exhaust side. Rhe bearing locks sit opposite each other. 1 is the nose. 4 is the aft jug. As mentioned it does not look like the oiler tube is sitting correct nor the chain guide. The tensioner rail should eventually stand up and the tang at the top bend of the rail sits in the cup of the lower chain case cover. This all assumes you have had the crank inspected measured and polished as well as the block at the main that spun.........etc.......etc. im not familiar with your repair manual, but besides the FSM, the haynes is pretty decent

[Hans]

Pistons have arrow on top that face front. You might want to order a Haynes manual and follow it step by step. I think Floyd was more into US cars.

[coloincaalpine RIP 2021]

Oh Crap!  I'm dyin" here.      This is the funniest thread that I have ever read on here.  LOL.  Meaning Lots Of Luck. So does this mean there is one 32mm nut holding the flywheel on?    I think someone is pulling our leg.

[DistortedJones]

2 hours ago, Guest_anonymous said:

There is probably more information you need than this thread is capable of addressing. Turn the crank around as mentioned. The main caps are usually numbered. The bearing locks sit lock to lock. The rod caps are numbered according to the jug. That number sits on the exhaust side. Rhe bearing locks sit opposite each other. 1 is the nose. 4 is the aft jug. As mentioned it does not look like the oiler tube is sitting correct nor the chain guide. The tensioner rail should eventually stand up and the tang at the top bend of the rail sits in the cup of the lower chain case cover. This all assumes you have had the crank inspected measured and polished as well as the block at the main that spun.........etc.......etc. im not familiar with your repair manual, but besides the FSM, the haynes is pretty decent

Yea all thats done. Just one more thing do the grooves on the main and rod caps opposite from each other or are they on the same side?

[coloincaalpine RIP 2021]

Reread GuestAnonymous.    Rods opposite,mains lock to lock.